Thomas holliday



UNITED STATES PATENT OFFICE.

THOMAS HOLLIDAY, OF HUDDERSFIELD, COUNTY OF YORK, ENGLAND, ASSIGNOR TOREAD HOLLIDAY & SONS, OF SAME PLACE.

PROCESS OF DYEING.

FsPECIPICATION forming part of Letters Patent No. 386,247,dr.ted July17, 1888.

(No specimens.)

To-aZZ whom it may concern.-

Be it known that I, THOMAS HOLLIDAY, a subject ofthe Queen of GreatBritain, residing in Huddersfield, in the county of York, England, haveinvented certain new and useful Improvements in Dyeing Cotton or otherVegetable Fibers, of which the following is a specification.

This invention in dyeing cotton or other vegetable fibers consists inthe formation thereon of the various insoluble colored products of thecombinations of the nitroso compounds of alpha and beta naphthol withmetallic oxides and the production of a further variety of shades ofcolor by the employment of the nitroso compounds in connection withdyestuffs at present in use that produce colors when combined withmetallic oxides.

The nitroso compounds I prefer to use in a finelyprecipitated state, andthe metallic oxides which produce good results are those of iron chromeand copper, though some others produce colors. The metallic oxides canbe fixed in the cotton in any known manner, the depth of colorobtainable being varied accord ing to the quantity of oxide fixed in thefiber. Taking, for example, one hundred pounds of cotton hanks on whichiron oxide has been fixed and boiling it in water to which, say, twentypounds of a ten per cent. nitroso-naphthol paste has been added, a greencolor fast to light will be produced.

It is not always necessary to-fix on the fiber the metallic oxide beforethe application of the nitrous compound, as when oil or tannic acid hasbeen applied to the cotton it will absorb ,l'romawarm bath ofnitroso-naphtholsufficient of that body to produce color when afterwardheated in a bath ofa metallic salt-such as bichromate ofpotashorsnlphate ofironthough in some cases a metallic salt and nitrosocompound may be present in the bath at the same time and the colorformed as fast as an oxide is deposited on the fiber. I prefer theseparate treatments already mentioned.

The metallic oxides can be employed when fixed on the fiber either bymeans of dyeing processes or the means usually employed bycalico-printers.

Dyestuffs-such as logwood, fustiealizarine, &c.ean be used in the samebath as the nitroso body, and will vary the resulting colors, or theycan be used either before or after.

Cotton or other vegetable fibers can be dyed either in a raw or finishedstate,or in any state of manufacture.

Having explained the nature of the invention and method of carrying itinto effect, I would have it understood that, without confining myselftothe details given,l disclaim herein the invention set forth in LettersPatent Ne. 362,835, granted to me May 10, 1887, which relates to thetreatment of animal fibers.

I claim- 1. The dyeing of cotton or other vegetable fiber by theformation thereon of the colored products of the combination of thenitroso compounds of alpha or beta naphthol with metallic oxides,substantially as described.

2. Cotton or other vegetable fiber colored with the combination of thenitroso compounds of alpha or beta naphthol with metallic oxide.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

THOM AS HOLLIDAY.

Vitnesses:

C. W. WHITMAN,

Consular A gent. Tnonxs H. BARRON,

lllorset Place, Huddersfield.

